The Human Ubiquitin+1 ELISA (Enzyme-Linked Immunosorbent Assay) kit is an in vitro enzyme-linked immunosorbent assay for the quantitative measurement of human Ubiquitin+1 in serum (human Ubiquitin+1 concentration is pretty low in normal serum/plasma, it may not be detected in this assay), plasma, cell culture supernatants and urine.